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ArmPkg/ArmScmiDxe: Add clock enable function

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Add function to allow enabling and disabling of the clock using the SCMI
interface. Add gArmScmiClock2ProtocolGuid to distinguish platforms that
support new API from those that just have the older protocol.

SCMI_CLOCK2_PROTOCOL also adds a version parameter to allow for future
changes. It is placed after the functions that are present in the
existing protocol to allow SCMI_CLOCK2_PROTOCOL to be cast to
SCMI_CLOCK_PROTOCOL so that only a single implementation of those
function are needed.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
This commit is contained in:
Jeff Brasen
2018-12-13 16:48:44 -07:00
committed by Ard Biesheuvel
parent 9bba10eb43
commit 559a07d84e
5 changed files with 268 additions and 0 deletions
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7
ArmPkg/Drivers/ArmScmiDxe/ArmScmiClockProtocolPrivate.h
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@@ -59,6 +59,13 @@ typedef struct {
CLOCK_RATE_DWORD Rate;
} CLOCK_RATE_SET_ATTRIBUTES;
// Message parameters for CLOCK_CONFIG_SET command.
typedef struct {
UINT32 ClockId;
UINT32 Attributes;
} CLOCK_CONFIG_SET_ATTRIBUTES;
// if ClockAttr Bit[0] is set then clock device is enabled.
#define CLOCK_ENABLE_MASK 0x1
#define CLOCK_ENABLED(ClockAttr) ((ClockAttr & CLOCK_ENABLE_MASK) == 1)